Becarefull if you buy a weathergaurd, i have a 665 (I think). It would not fit down inside of my short bed box. It would hit the wheelwell when it sat all the way down. So I found someone that had a old body-lift and used 4 of the 3" blocks. It worked pretty good, now I can lay sheets of plywood down uner the box. And keep it clean out better. The box only sticks up a 1" or so, and I pull a 5er with it and I have no problems, except for seeing the hitch when hookin up.